The purpose for this word? Well most people don't have labels, liek that have a bit of everything mixed together, like a non - poser person. So you would use this word for someone who has a bit of everything mixed in them, but they are not a poser.
Posers are people who label themselves, but Scenogothunkverything people do not label themselves, therefore they are not posers.
Girl 1: Whoa! That girl has a little bit of everything mixed in her.
Girl 2: Like she's a "Scenogothunkverything" girl.
Girl 1: What's that?
Girl 2: A person who is not a poser and has a label, but has a little bit of everything in them.